Mandrel-extractor for boiler tube or flue expanders.



J. W. FABSSLER. MANDBEL EXTRAGTOR FOR BOILER TUBE OR FLUE EXPANDERS.

APPLIOATION FILED FEB.19, 1912.

1,053,372. Patented Feb. 18, 1913.

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Sheet notation 0! Letters Patent.

Patented Feb. 18, 191?.

"Application aiedretruar 15,1912. Serial r... 878,581.

To all wkomit mag concern: Be it known that I, JOHN W. 'Fan ssnaa,-a-citizen of the United States,'- and resident of Moberly, Randolphcounty, Missouri, have invented certain new and useful Im rovements inMandrel-Extractors i for oiler Tube or Flue Expanders, of whichv thefollowing is a specification containinga full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof. I

My invention relates to'improvements in mandrel extractors for boiler'tubeor flue expanders, and the object of'my'invention is to construct amandrel extractor arranged" to be fitted over the mandrel and againstthe expander and tobe impacted in order to remove the mandrel from theexpander.

With the above purposes in view my invention consists in certain novelfeatures of construction and arrangement of parts as will be hereinaftermore fully described, pointed out in the claims and illustrated by theaccompanying drawing,,in which the figure represents in elevationanexpander and a mandrel therefor, and m improved extractor partly insection "em racing the mandrel and in engagement with the expander in aosition to extract the mandrel.

Referring 'y numerals to the'accompanying drawing: 1 designates the bodof my extractor having a bore 2 leading om'the blunt circular impact endto a point adjacent the opposite end of the body.

3 designates a boss which projects from the closed end of the body 1 andis arranged to be received by a cavity formed in the end of a tool 4.The tool 4 is provided with .a shank 5 arranged to be inserted in thebody portion 6 of a neumatic hammer;

7 designates a man rel having a tapering end 8 which is polygonal incross section.

9 designates a sectional expander, the sections of which are arranged asusual in the form of a ring or cylinder and inserted into the end of aflue .or tube 10 in order that the end of the tube may be securelyheldin tractor 1 is placed over the mandrel as shown inthe drawing withits-circular blunt jlmpact end against all the sections of the expanderand the blunt pneumatic-hammer connection 3 inengagement with the tool 4of the pneumatic hammer. The hammer is then set in operation and theextractor is "impacted,each impact tending to move sismultaneousl all ofthe expander sections relative-to t e mandrel and in the rebound aftereach impact the expander sections will find a new seat on the mandrelnearer to the end of the taper. Due to the inertia of the mandrel andthefrequenc of the impacts of a pneumatic'hammer the mandrel slipsoutward very rapidly relative to the expander sections, so that theoperation of extracting the mandrel is accomplished with great rapidityin comparison with the present day method of loosening the mandrel byside blows delivered upon said mandrel with hand hammers.

I claim: 1. A mandrel extractor for sectional boiler tube-expanders,"comprising a tool constructed with a blunt circular impact surface atone end and a blunt hammering surface at its' opposite end, to beinterposed between the ring of sections of said tubeexpander and ahammer, to simultaneously dr1ve upon all thesections of said expanderand by the inertia of the mandrel loosen the same.

2. A mandrel extractor for sectional boiler tube-expanders, comprisin atool construct-- expander and a hammer, and to receive blows from saldhammer and simultaneously impart the same to all the sections of saidexpander and thereby extract the mandrel.

. In testimony whereof, I have signed my 7 name to this specification,in presence of two subscribing witnesses.

JOHN W. FAESSLER.

